废弃等离子屏湿法冶金提银废水处理工艺研究  

Study on Treatment of Wastewater after Silver Extraction from Waste Plasma Screen by Hydrometallurgy

作　　者：陈伟[1,2] 宁平[1] 袁翠玉[2] 欧阳坤[2] 万斯[2] 王兵[2] 朱安玲[2] CHEN Wei NING Ping YUAN Cui-yu OUYANG WAN Si WANG Bing ZHU An-ling(School of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650093 Hunan Research Institute for Nonferrous Metals, Changsha 338000, China)

机构地区：[1]昆明理工大学环境科学与工程学院,昆明650093 [2]湖南有色金属研究院,长沙410100

出　　处：《有色金属（冶炼部分）》2016年第10期70-73,共4页Nonferrous Metals（Extractive Metallurgy)

摘　　要：对等离子屏湿法冶金提银废水分别采用"中和+氧化+絮凝"、蒸发法、"中和+絮凝+蒸发法"进行处理。结果表明,"中和+絮凝+蒸发"方案对该废水中的重金属和COD等污染物均有较好的处理效果,还能通过回收硝酸和出售中和渣,实现废水处理和回收成本价值基本平衡,且冷凝水回用到生产工艺中对生产指标无影响。Waste water from silver extraction by hydrometallurgy from waste plasma display panels was treated by neutralization ＋ oxidation ＋ flocculation, evaporation, and neutralization ＋ flocculation ＋ evaporation, respectively. The results show that neutralization ＋ flocculation ＋ evaporating method has high removal efficiency for heavy metals and COD, and can also achieve basic equilibrium in wastewater treatment and recycling cost value by recovery of nitric acid and sale of neutralization residues. Moreover, condensed water can be recycled in production process no effect on production index.

关 键 词：等离子屏 湿法冶金 中和 絮凝 蒸发 

分 类 号：X703[环境科学与工程—环境工程]